Review: 'Blackfish' and the thorny captivity of a killer whale

The stirring documentary "Blackfish" vividly tracks the thorny case of Tilikum, a 12,000-pound killer whale and longtime SeaWorld Orlando attraction responsible for three deaths over the course of several decades in captivity.

The through-line: In 1992, SeaWorld purchased Tilikum from Victoria, Canada's shuttering Sealand Park, where the orca was one of three whales involved in the drowning death of a trainer. Though, according to the film, SeaWorld asserted that Tilikum would be used only for breeding, the whale went on to perform at its Orlando site. Did so many years in allegedly traumatic, soul-crushing captivity, against the hyper-intelligent mammal's natural bent (orcas have no record of violence against humans in the wild), contribute to Tilikum's 2010 fatal attack on veteran SeaWorld trainer Dawn Brancheau? Is this just another case of corporate greed and deception trumping employee — and animal —safety?

Since SeaWorld declined to comment here — and only last week issued a statement to film critics rebutting many of Cowperthwaite's charges — "Blackfish," named after the Native American term for orcas, remains decidedly one-sided. But when that "side" is such a vital, convincing proponent for the greater protection and understanding of such evolved and majestic creatures, it can't help but win.